If you have a Google Mail account (G-Suite or gmail.com) you can take advantage of Google Drive to share files within your organisation. Download the program here:
and configure it with your gmail address. An icon appears in your system tray and will allow you to drag files over, at which point the files will be copied to the cloud. They are synchronied as well, so any changes will be replicated in the cloud. Other users can also download and install the Google Drive software to access the files and make changes, add new files etc.